公开(公告)号：US07953401B2

公开(公告)日：2011-05-31

申请号：US12054135

申请日：2008-03-24

Applicant: James A. Hutchison ,  Parag Mohan Kanade ,  Bhupesh Manoharlal Umatt ,  Alex Kuang-Hsuan Tu ,  Messay Amerga ,  Vineet Mittal ,  Michael Kevin Spartz

Inventor： James A. Hutchison ,  Parag Mohan Kanade ,  Bhupesh Manoharlal Umatt ,  Alex Kuang-Hsuan Tu ,  Messay Amerga ,  Vineet Mittal ,  Michael Kevin Spartz

IPC: H04M3/00

CPC classification number: H04W48/18 ,  H04W52/0229 ,  H04W52/0264 ,  H04W52/0274 ,  Y02D70/00

Abstract: Methods and apparatus for out of service processing with varied behaviors. In an aspect, a method is provided for service acquisition. The method includes determining one or more conditions, wherein each condition is associated with at least one weight, detecting whether an out-of-service event has occurred, and if an out-of-service event is detected: identifying selected conditions and associated weights, and processing the associated weights to determine service acquisition “on” and “off” times. In an aspect, an apparatus includes condition logic configured to determine one or more conditions, wherein each condition is associated with at least one weight, and processing logic configured to detect whether an out-of-service event has occurred, and if an out-of-service event is detected, to identify selected conditions and associated weights, and process the associated weights to determine service acquisition “on” and “off” times.

Abstract translation: 不同行为的停止服务处理方法和设备。 在一方面，提供了用于服务获取的方法。 该方法包括确定一个或多个条件，其中每个条件与至少一个权重相关联，检测是否已经发生服务外事件，以及是否检测到服务外事件：识别所选择的条件和相关权重 ，并处理相关权重以确定服务获取“开”和“关”次。 一方面，一种装置包括条件逻辑，其被配置为确定一个或多个条件，其中每个条件与至少一个权重相关联，以及处理逻辑，被配置为检测是否发生了服务外事件， 检测服务事件，识别所选条件和相关权重，并处理相关权重以确定服务获取“开”和“关”次。

公开(公告)号：US07917163B2

公开(公告)日：2011-03-29

申请号：US10650564

申请日：2003-08-27

Applicant: Messay Amerga

Inventor： Messay Amerga

IPC: H04B1/00 ,  H04B7/00 ,  H04B1/38 ,  H04B7/216 ,  H04B15/00 ,  H04W36/00 ,  H04J3/06

CPC classification number: H04W48/20 ,  H04W36/0083

Abstract: Techniques for intra-frequency searching in the presence of frequency gaps are disclosed. In one embodiment, a search is scheduled and frequency switches are suppressed during the scheduled search. In another embodiment, a search is scheduled in between anticipated frequency gaps. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled and frequency switches are suppressed during the scheduled search. Various other embodiments are also presented. Benefits include allowing prescribed levels of intra-frequency and inter-frequency search to be performed which allows for improved base station selection and therefore improved performance and system capacity.

Abstract translation: 公开了在存在频率间隙的情况下进行频率内搜索的技术。 在一个实施例中，调度搜索并且在调度搜索期间抑制频率切换。 在另一个实施例中，在预期频率间隙之间调度搜索。 在另一个实施例中，部署了计时器，其期限指示将要调度搜索。 在另一个实施例中，部署定时器，其期限指示将要调度搜索，并且在调度搜索期间抑制频率切换。 还提出了各种其它实施例。 优点包括允许执行规定级别的频率内和频率间搜索，从而改善基站选择，从而提高性能和系统容量。

公开(公告)号：US07729412B2

公开(公告)日：2010-06-01

申请号：US10057689

申请日：2002-01-24

Applicant: Jeremy M. Stein ,  Ivan Fernandez-Corbaton ,  Roland R. Rick ,  Borislav Ristic ,  Ashok Bhatia ,  Messay Amerga

Inventor： Jeremy M. Stein ,  Ivan Fernandez-Corbaton ,  Roland R. Rick ,  Borislav Ristic ,  Ashok Bhatia ,  Messay Amerga

IPC: H04B1/69 ,  H04L27/06

CPC classification number: G01S19/24 ,  G01S5/0215 ,  G01S5/0221 ,  G01S19/21 ,  G01S19/31 ,  G01S19/46

Abstract: A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

Abstract translation: 描述了用于使用动态变化的积分时间从从信号导出的相关函数中估计一个或多个参数的参数估计器。 可以在用户台中使用参数估计器来估计无线通信系统中的一个或多个基站或扇区导频信号的到达时间。 该信息可以用于用于估计用户台的位置的总体高级前向链路三边测量（AFLT）过程。

公开(公告)号：US20100080192A1

公开(公告)日：2010-04-01

申请号：US12239027

申请日：2008-09-26

Applicant: Brian Dong ,  Messay Amerga ,  Supratik Bhattacharjee ,  Xiaoming Zhu

Inventor： Brian Dong ,  Messay Amerga ,  Supratik Bhattacharjee ,  Xiaoming Zhu

IPC: H04W36/30

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70753 ,  H04B1/70758 ,  H04B2201/70702 ,  H04W36/30 ,  H04W48/16

Abstract: Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH search is performed blindly, without any slot timing information from the P-SCH. Performance is improved while maintaining the benefits of faster acquisition methods in good channel conditions. The full-window search is more time consuming, but takes advantage of the stronger CPICH transmission. In good channel conditions, a mobile device can proceed quickly with the normal method of timing acquisition. With failure, the mobile device can switch to the longer search which has a higher probability of successfully completing the hard handover procedure. The overall effect is a higher success rate of hard handovers without a uniform increase of time spent in cell timing acquisition.

Abstract translation: 通过首先通过检测跟随公共导频信道（CPICH）的主同步信道（P-SCH）来尝试检测目标切换小区来检测小区定时。 如果失败，则使用CPICH上的全窗口搜索来执行N次重试。 完全窗口CPICH搜索盲目执行，没有来自P-SCH的任何时隙定时信息。 性能得到改善，同时在良好的通道条件下保持更快的采集方法的好处。 全窗口搜索更耗时，但利用更强的CPICH传输。 在良好的信道条件下，移动设备可以通过正常的定时采集方法快速进行。 随着故障，移动设备可以切换到成功完成硬切换过程的较高概率的较长搜索。 总体效果是更高的硬切换成功率，而没有在单元定时采集中花费的时间的均匀增加。

公开(公告)号：US07593367B2

公开(公告)日：2009-09-22

申请号：US10173209

申请日：2002-06-14

Applicant: Messay Amerga ,  Vikas Nagpal ,  Wen Jing New ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya ,  Bhupesh Manoharlal Umatt

Inventor： Messay Amerga ,  Vikas Nagpal ,  Wen Jing New ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya ,  Bhupesh Manoharlal Umatt

IPC: H04Q7/00 ,  H04B7/216

CPC classification number: H04W48/16 ,  H04B1/707 ,  H04B1/70735 ,  H04B17/27 ,  H04B17/318 ,  H04B17/382 ,  H04L2027/0034 ,  H04W24/00 ,  H04W52/0245 ,  Y02D70/1222 ,  Y02D70/40

Abstract: Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on one or more of those frequencies when the power measurement exceeds a threshold. In another aspect, the power is measured at one or more frequencies in a band of frequencies surrounding a frequency at which the measured power exceeded a threshold. If the measured power at one or more of the frequencies in the band exceeds a second threshold, a system search is performed at one or more of those frequencies. In yet another aspect, frequencies meeting certain criteria are sorted in order of measured power prior to system search or further power measurement, and subsequent processing is performed in order of descending measured power. Various other aspects are also presented. These aspects have the benefit of reducing acquisition time, which results in faster system access and allows for more efficient use of system resources.

Abstract translation: 公开了减少采集​​中频率扫描所需时间的技术。 在一个方面，在一个或多个可能的载波频率进行接收功率测量，并且当功率测量超过阈值时，对这些频率中的一个或多个进行系统搜索。 在另一方面，在测量功率超过阈值的频率周围的频率带中的一个或多个频率处测量功率。 如果频带中的一个或多个频率处的测量功率超过第二阈值，则在这些频率中的一个或多个频率处执行系统搜索。 在另一方面，满足某些标准的频率在系统搜索或进一步功率测量之前按照测量的功率的顺序进行分类，并且随后的处理按照下降的测量功率的顺序执行。 还提出了各种其他方面。 这些方面具有减少采集时间的优点，这导致更快的系统访问并且允许更有效地使用系统资源。

公开(公告)号：US07558534B2

公开(公告)日：2009-07-07

申请号：US10125182

申请日：2002-04-17

Applicant: Jeremy Stein ,  Ivan Fernandez-Corbaton ,  Roland R. Rick ,  Messay Amerga

Inventor： Jeremy Stein ,  Ivan Fernandez-Corbaton ,  Roland R. Rick ,  Messay Amerga

IPC: H04B17/00 ,  H04M1/00

CPC classification number: H04W64/00 ,  G01S5/0205 ,  G01S5/0215

Abstract: A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely and/or obtaining an indication of whether a multi-path signal condition is present or likely. Responsive to one or both of these indications, the method derives a reliability metric for the parameter estimate. In one embodiment, the parameter estimate is an estimate of time of arrival (TOA) of the signal, and the reliability metric is root mean square error (RMSE) of the time of arrival estimate. This embodiment obtains an indication of whether a non line of sight signal condition is present or likely based on a measure of the strength of the correlation function at the peak thereof. The measure of the strength of the correlation function at the peak thereof may be energy per chip divided by total received power (Ec/I0) or may simply be the raw energy of the correlation function at the peak. The RMSE metric which is computed in this embodiment varies inversely with the peak strength of the correlation function.

Abstract translation: 描述了使用相关性分析来生成从信号导出的参数估计的可靠性度量的方法。 该方法通过获得视线信号条件是否存在或可能存在和/或获得多径信号状况是否存在或可能的指示开始。 响应于这些指示中的一个或两个，该方法导出参数估计的可靠性度量。 在一个实施例中，参数估计是信号的到达时间（TOA）的估计，可靠性度量是到达时间估计的均方根误差（RMSE）。 该实施例基于在其峰值处的相关函数的强度的度量来获得是否存在非线视觉信号条件或可能的指示。 峰值处的相关函数的强度的度量可以是每个芯片的能量除以总接收功率（Ec / I0），或者可以简单地是峰值处的相关函数的原始能量。 在本实施例中计算的RMSE度量与相关函数的峰值强度成反比变化。

公开(公告)号：US07340268B2

公开(公告)日：2008-03-04

申请号：US10457846

申请日：2003-06-10

Applicant: Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

Inventor： Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

IPC: H04B7/00 ,  H04Q7/20

CPC classification number: H04W52/56 ,  H04W52/40 ,  H04W52/58

Abstract: The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is considered reliable if its absolute value exceeds the TPC target value. Received TPC commands deemed as unreliable are discarded and not used for power control. Multiple TPC target values, used for detecting UP and DOWN commands, may be derived with multiple scaling factors. For a receiver in soft handover and receiving TPC commands from multiple transmitters, a different TPC target value may be derived for each transmitter. The received TPC commands for each transmitter are compared against that transmitter's TPC target value. Received TPC commands deemed as unreliable are discarded and not combined.

Abstract translation: 基于TPC目标值确定从发射机接收的发射功率控制（TPC）命令的可靠性。 TPC目标值基于TPC阈值和可能的权重导出，这取决于接收机实现。 如果接收到的TPC命令的绝对值超过TPC目标值，则认为它是可靠的。 被认为不可靠的TPC命令被丢弃，不用于功率控制。 用于检测UP和DOWN命令的多个TPC目标值可以用多个缩放因子导出。 对于软切换中的接收机和从多个发射机接收TPC命令，可以为每个发射机导出不同的TPC目标值。 每个发射机接收的TPC命令与该发射机的TPC目标值进行比较。 被认为不可靠的TPC命令被丢弃并不组合。

公开(公告)号：US07286801B2

公开(公告)日：2007-10-23

申请号：US10946853

申请日：2004-09-21

Applicant: Messay Amerga ,  Chalapathi Rao Emani

Inventor： Messay Amerga ,  Chalapathi Rao Emani

IPC: H04B17/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/70702 ,  H04W24/00 ,  H04W36/30 ,  H04W48/16 ,  H04W52/0206 ,  H04W52/0245 ,  H04W88/08 ,  Y02D70/40

Abstract: For cell measurement, a wireless device categorizes cells whose identities are known to the device into multiple sets. The wireless device may obtain these cells from the system via signaling and/or detect these cells via searches. Different sets of cells may be associated with different levels of importance (e.g., for handoff), require different amounts of processing for measurements, and so on. Each set is associated with a particular measurement rate. Cells deemed to be more important (e.g., for handoff) are measured more frequently. Cells deemed to be less important and/or require more processing for measurements (e.g., cells with unknown timing) are measured less frequently. The wireless device performs searches and makes measurements for the cells in each set at the measurement rate selected for that set.

Abstract translation: 对于小区测量，无线设备将其设备已知的身份的小区分为多组。 无线设备可以经由信令从系统获得这些小区，和/或通过搜索来检测这些小区。 不同的单元组可以与不同的重要程度相关联（例如，用于切换），需要不同量的用于测量的处理等等。 每组与特定的测量速率相关联。 更频繁地测量被认为更重要的小区（例如，用于切换）。 被认为不那么重要和/或需要更多的测量处理的细胞（例如，具有未知定时的细胞）被更少地测量。 无线设备以为该组选择的测量速率进行搜索并对每组中的小区进行测量。

公开(公告)号：US06944143B1

公开(公告)日：2005-09-13

申请号：US09540802

申请日：2000-03-31

Applicant: Gwain Bayley ,  Robbin Hughes ,  Messay Amerga

Inventor： Gwain Bayley ,  Robbin Hughes ,  Messay Amerga

IPC: H04W48/20 ,  H04Q7/00

CPC classification number: H04W48/20

Abstract: A method and apparatus for improving searching in a remote unit of a slotted mode, wireless, communication system. In a slotted mode communication system, the remote unit enters an “active state” during its assigned slot. While in the active state, a controller in the remote unit passes selected sets of search parameters to a search engine. The order that the searches are performed is based on the measured signal strength and the age of the measurement. The search engine performs searches using the selected sets of search parameters. Searching continues as long as the remote unit is in the active state. When the remote unit enters the inactive state, searching ceases. While in the inactive state, the controller evaluates the results of the searches performed during the previous active state. During the next active state, the next sequence of searching is performed based on measured signal strength and the measurement age corresponding to the measurements made during the previous active state.

Abstract translation: 一种用于改进在时隙模式，无线，通信系统的远程单元中的搜索的方法和装置。 在时隙模式通信系统中，远程单元在其分配的时隙期间进入“活动状态”。 在处于活动状态时，远程单元中的控制器将所选择的一组搜索参数传递给搜索引擎。 执行搜索的顺序是基于测量的信号强度和测量的年龄。 搜索引擎使用所选择的搜索参数集执行搜索。 只要远程单元处于活动状态，搜索继续。 当远程单元进入非活动状态时，搜索停止。 在处于非活动状态时，控制器评估在先前活动状态期间执行的搜索结果。 在下一活动状态期间，基于测量信号强度和对应于在先前活动状态期间进行的测量的测量年龄来执行下一个搜索序列。

公开(公告)号：US06574483B1

公开(公告)日：2003-06-03

申请号：US10252760

申请日：2002-09-23

Applicant: Messay Amerga

Inventor： Messay Amerga

IPC: H04B700

CPC classification number: H04B1/7117 ,  H04B7/022 ,  H04B7/0491

Abstract: A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of the fingers is demodulating a supplemental channel (112). When no fingers are demodulating supplemental channels, the it is determined whether the sector containing the path under consideration supports supplemental channels (114). If the sector containing the path under consideration supports supplemental channels, then the method determines the strength of the signal path relative to the weakest finger (116). If the path is a certain amount greater in strength then the weakest finger, then the method involves reassigning that finger to the path with the supplemental channel (108) and if the path with the supplemental channel is a certain amount of strength weaker than the weakest finger plus a certain value, then the method involves determining whether the weakest finger is the only one supporting the supplemental channel (118). If the weakest finger is the only one supporting supplemental channels, and the sector supports supplemental channels (120), then that finger is assigned to the demodulation path with the supplemental channel (108), thus insuring that the information on a supplemental channel is always demodulated by a finger during a soft-handoff in a high data rate call. If one or more fingers are already demodulating supplemental channels, then the finger assignment algorithm will proceed in the conventional way.

Abstract translation: 一种方法和通信系统，用于将多个指状物分配给路径列表中的解调路径，确保至少一个手指将被分配给支持补充信道的解调路径（如果存在）。 该方法涉及确定任何一个手指是否解调补充信道（112）。 当没有手指解调补充信道时，确定包含正在考虑的路径的扇区是否支持补充信道（114）。 如果包含正在考虑的路径的扇区支持补充信道，则该方法确定相对于最弱手指（116）的信号路径的强度。 如果路径的强度一定大于最弱的手指，则该方法包括将该手指重新分配到具有补充通道（108）的路径上，并且如果具有补充通道的路径具有弱于最弱的一定强度的强度 手指加一定值，则该方法涉及确定最弱的手指是否是唯一支持补充通道（118）的手指。 如果最弱的手指是唯一支持补充信道的手指，并且扇区支持补充信道（120），那么该手指被分配给具有补充信道（108）的解调路径，从而确保补充信道上的信息总是 在高数据速率呼叫中的软切换期间由手指解调。 如果一个或多个手指已经解码补充信道，则手指分配算法将以常规方式进行。